Propeller.



J. J. IVANCEVICH.

PBOPELLER.

APPLIUTION FILED JUNE 11, 1913.

Patented Feb. 17,1914.

JOHN J. IVANCEVICH, OE PORTLAND, OREGON.

PROPELLEB.

Specification of Letters Patent.

Application led .Tune 11, 1913. Serial No. 773,086.

To all 'whom it may concern Be it known that l, JOHN J. lvANcEvioi-I, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Propellers, of which the following is a specification.

This invention relates to an improvement in propellers, and has for its object to provide a propeller for use in either water or aerial navigation, but it is especially adapted for use in the air.

A further object is to provide a revolving motor which is so constructed that its wings will offer a resistance to the medium in which they move while at one side of the point of revolution, and will swing so as to offer the least possible resistance while at the other side of that point.

These and other objects are accomplished by means which are illustrated in the accompanying drawing, in which- Figure 1 is a plan view of the propeller when standing in a horizontal position on its axis. Fig. 2 is a side elevation of same. Fig. 3 is a. sectional view taken on the line A--A of Fig. 1. Fig. 4 is an end view showing the wings separated and presenting their edges toward the line of movement.

Describing the drawing in detail, 1 represents a pair of bars, spaced apart and pivoted at their median points to the sleeve 11 which is held between the collars 2O on the fixed shaft 14. Toward each end of each arm or bar 1 is fixed at right angles thereto a pivot pin 3. These pins are disposed in pairs, and the pair at each end is at the opposite side of the bars with reference to the other. Upon each of said pins is pivoted a bracket 4 carrying a rod 5, upon which is secured a metallic sheet 2, to which is secured at its outer edge another bar 5. From each lower bar 5 a pivot bar extends to and connects with the opposite upper bar 5, which holds the bars 5 parallel to each other, which will permit the sheet-s to separate at their outer edges and to approach each other at their inner edges, by the separation of bars 1; and conversely, by the contraction of bars 1, the sheets will be brought to approximately parallel position and somewhat separated from each other. At a suitable point intermediate the central shaft and the terminus of each bar 1 is pivoted upon pin 7. a toggle link 8 connected by means of pin 9 with the connecting rod 10 which is slidably mounted by means of the longitudinal loop 22 upon the shaft 14, between the shoulders 21. At the median portion each bar4 1 is divided into upper and lower portions which are shaped to describe a circle la, and in which are formed at right angles to the plane of the arms, the bearings 13a carrying the spindles 13 which are fixed in the sleeve 11. These spindles are sustained by the stay 12, which is circularly formed in 'conformity to the circular portion 1a.` Fixed upon the shaft 14 adjacent one end of sleeve 11 is a sprocket wheel 15 carrying a chain 16 engaged upon the similar sprocket 15a fixed upon the shaft 172L carried in a suitable bearing formed upon one of the stays 12 parallel with the main axle 14. Upon the inner end of shaft 17a is fixed a crank 17 having a wrist pin 23 which has a sliding bearing in the transverse slot'18 formed in the head of the connecting rod 10.

The shaft 14 being fixed, and power being applied to the pulley 19 secured upon the sleeve 11, preferably at the end opposite from the sprocket wheels, the sleeve .will be rota-ted, for example, in the direction indicated by the arrow. With each revolution of the arms 1 there will be yone revolution of the crank 17 causing the connecting rod to move through one cycle. As the connecting rod reaches the forward limit of its throw, as seen in Fig. 1, the arms will be spread to their limit which will rock the arms 1 on the spindles 13, expanding the advancing ends and contracting the returning ends to the positions indicated at 1b. This will cause the wings at one end to expand and gather the lair while those at the other end will present their edges to the air. By the rotation of crank 17 the pitman rod will be caused to reach the opposite limit of its throw at the moment the other ends of bars 1 reach the point in their revolution described for the ends carrying the toggle links. This will retract the toggle links, and contract that end of the bars carrying them, which correspondingly expands the other ends. In this manner the wings are made to expand and resist the air or medium through which they move in one half of their revolution, and to present their edges to the line of advancement in the other half of their revolution, thereby causing a constant pressure against such medium, the force of which will react upon the ves- Patented Feb. 17, 1914.

sel carrying the propeller, to give it locomotion.

It is obvious that by reversing the direction of the power upon the pulley 19 a eorresponding change in the direction of the vessel will be effected.

Having new described my invention, what I claim, is-

l. A propeller1 comprising a shaft, a. sleeve mounted thereon, bars pivoted at an intermediate point upon said sleeve, a pitman rod slidably mounted upon the sleeve between said bars, a toggle link connecting the free end of the pitman with each arm, wings mounted to collapse and expand upon each end of the arms, and means for reciprocating said pitman to alternately contract and expand each end of the pair of bars.

2. A propeller comprising a shaft, a sleeve mounted thereon, bars each having a looped central portion, a pivot member connecting the sleeve centrally in each looped portion, a pitman rod slidably mounted upon the sleeve between said bars, a toggle link connecting the free end of the pitman with each arm, wings mounted to collapse and expand upon each end of the arms, a shaft mounted to bear in one of said pivot members, having a gear wheel fixed thereon, means operatively connecting said gear wheel with the main shaft, and a crank fixed upon the second mentioned sha-ft having a wrist pin engaged in a transverse slot in the head of the pitman for alternately expanding and contracting the opposed members of said bars at each end. Y

3. A propeller comprising a shaft, a sleeve mounted thereon, bars each having a looped central portion, a pivot member connecting the sleeve centrally in each looped portion, a pitman rod slidably mounted upon the sleeve between said bars, a toggle link connecting the free end of the pitman with each arm, wings mounted to collapse and expand upon each end of the arms, a shaft mounted to bear in one of said pivot members, hav ing a gear wheel fixed thereon, means operatively connecting said gear wheel with the main shaft, and a crank fixed upon the second mentioned shaft having a. wrist pin engaged in a transverse slot in the head of the pitman, whereby the bars may be simultaneously expanded at one end and contracted at the other, at a given point in their revolution, and such movements will be reversed at one half revolution therefrom.

4. A propeller comprising a shaft, a sleeve mounted thereon, bars pivoted at an intermediate point upon said sleeve, a pitman red slidably mounted upon the sleeve between said bars, a toggle link connecting the free end of the pitman with each arm, wings mounted to collapse and expand upon opposing faces at each end of each pair of arms, means for reciprocating said pitman to alternately contract and expand each end of the pair of bars, and means for preserving the wing supports parallel to each other.

In testimony whereof I aflix my signature in the presence of two witnesses.

JOI-IN J. VANGEVICH.

Witnesses:

E. E. HECKBERT, HAZEL A. ARMSTRONG.

Copies of thspatent may be obtained for five cents each, by addressing the Commissioner o Patents, Washington, D. C. 

